No side yard is required in an ARTS zone for a principal building; however, if a side yard is provided it shall be at least two inches (2 in.) wide for each foot of height of building but no less than five feet (5 ft.).
Any portion of a building setback from the side lot line shall be considered a side yard and not a court.
D.C. Mun. Regs. tit. 11, r. 11-K806